Global Mixed-mode Technology Inc.
G952
1.8V 1A Regulator
Features
Output current in excess of 1A
Output voltage accuracy +2.5%/-2%
Quiescent current, typically 480µA
Internal short circuit current limit
Internal over temperature protection
General Description
The G952 positive 1.8V voltage regulator features
the ability to source 1A of output current. The typical
quiescent current is 0.48mA.
Applications
PC motherboard
ADSL/Cable Modem
Set-Top-Box
LAN switch/Hub
Broad band access
Familiar regulator features such as over tem-
perature and over current protection circuits are
provided to prevent it from being damaged by
abnormal operating conditions.
Ordering Information
ORDER
NUMBER
G952T23U
G952T24U
G952T25U
G952T43U
G952T63U
G952T65U
ORDER NUMBER
(Pb free)
G952T23Uf
G952T24Uf
G952T25Uf
G952T43Uf
G952T63Uf
G952T65Uf
TEMP.
RANGE
-40°C~85°C
-40°C~85°C
-40°C~85°C
-40°C~85°C
-40°C~85°C
-40°C~85°C
PACKAGE
SOT-89
SOT-89
SOT-89
TO-252
SOT-223
SOT-223
1
GND
GND
V
IN
GND
GND
V
IN
PIN OPTION
2
V
OUT
V
IN
GND
V
OUT
V
OUT
GND
3
V
IN
V
OUT
V
OUT
V
IN
V
IN
V
OUT
* For other package types and pin options, please contact us at sales
@
gmt.com.tw
Order Number Identification
GXXX
XX
X
X
Packing Type
Pin Option
Package Type
Part Number
PACKAGE TYPE
T2: SOT-89
T4: TO-252
T6: SOT-223
1
1: V
OUT
2: V
OUT
3: GND
4: GND
5: V
IN
6: V
IN
PIN OPTION
2
GND
V
IN
V
OUT
V
IN
GND
V
OUT
3
V
IN
GND
V
IN
V
OUT
V
OUT
GND
PACKING
U : Tape & Reel
Package Type
Typical Application
[Note 4]: Type of C
OUT
I
O
Top View
Top View
V
IN
C1
1µF
G952
IQ
V
OUT
C
OUT
10µF
1
2
3
1
2
3
SOT-89
、SOT-
223
TO-252
Ver: 2.6
Mar 19, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
(Note 1)
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Power Dissipation Internally Limited
(Note 2)
Maximum Junction Temperature . . . . . . . . . . . 150°C
Storage Temperature
Range . . . . . . . . . . . . . . . . . . . . .65°C
≤
T
J
≤+150°C
Reflow Temperature (soldering, 10sec) . . . . . 260°C
Thermal Resistance Junction to Ambient, (θ
JA
)
SOT-89 . . . . . . . . . . . . . . . . . . . . . . . . . . . .173°C/W
SOT-223 . . . . . . . . . . . . . . . . . . . . . . . . . . .148°C/W
TO-252 . . . . . . . . . . . . . . . . . . . . . . . . . . . .124°C/W
Thermal Resistance Junction to Case, (θ
Jc
)
SOT-89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25°C/W
SOT-223. . . . . . . . . . . . . . . . . . . . . . . . . . . 22°C/W
TO-252. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7°C/W
Note
(1)
: See Recommended Minimum Footprint
G952
Absolute Maximum Ratings
Operating Conditions
(Note 1)
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . .2.7V~6.5V
Temperature Range. . . . . . . . . . . . . . -40°C
≤
T
A
≤85°C
Electrical Characteristics
V
IN
=3.3V, I
O
= 1A, C
IN
= 1µF, C
OUT
=10µF, All specifications apply for T
A
= T
J
= 25°C. [Note 3]
PARAMETER
Output Voltage
Line Regulation
Load Regulation
Output Impedance
Quiescent Current
Ripple Rejection
CONDITION
10mA < I
O
< 1A
10mA < I
O
< 550mA (SOT-89)
3V < V
IN
< 6.5V, I
O
= 10mA
10mA < I
O
< 1A
10mA < I
O
< 550mA (SOT-89)
200mA DC and 100mA AC, fo = 120Hz
V
IN
= 3.3V
f
i
= 120Hz,V
ripple
=1V
P-P
, Io = 100mA
I
O
= 0A
I
O
= 100mA
I
O
= 500mA for (SOT-89,SOT-223,TO-252)
I
O
= 1A only for (SOT-223,TO-252)
Minimum footprint
(0.0625 square inch)
Continuous Test,
Mounted on 0.53
T
A
= 25°C, T
J
150°C, V
IN
= 3.3V(SOT-223)
square inch pcb area
V
OUT
within
±2%
Mounted on 0.16
V
IN
= 3.3V(SOT-89)
square inch pcb area
V
IN
= 3V(SOT-223)
MIN
1.764
1.764
---
---
---
---
300
---
---
---
---
---
---
---
---
---
---
TYP
1.800
1.800
3
30
30
80
480
53
880
895
950
1160
660
1
0.5
1.6
150
MAX
1.845
1.845
30
50
50
---
1500
---
---
---
---
---
---
---
---
---
---
UNIT
V
V
mV
mV
mV
mΩ
µA
dB
Dropout Voltage
mV
mA
A
A
A
°C
Output Current
Short Circuit Current
Over Temperature
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions are
conditions under which the device functions but the specifications might not be guaranteed. For guaranteed specifications
and test conditions see the Electrical Characteristics.
Note2:
The maximum power dissipation is a function of the maximum junction temperature, T
Jmax
; total thermal resistance,
θ
JA
,
and ambient temperature T
A
. The maximum allowable power dissipation at any ambient temperature is T
jmax
-T
A
/
θ
JA
. If
this dissipation is exceeded, the die temperature will rise above 150°C and IC will go into thermal shutdown. For the
G952 in SOT-89 package.
θ
JA
is 173°C/W For the G952 in SOT-223 package,
θ
JA
is 148°C/W, in TO-252 package,
θ
JA
is 124°C/W. (See recommend minimum footprint). The safe operation in SOT- 89, SOT-223, TO-252 package, it can
see
“Typical
Performance Characteristics” (Safe Operating Area).
Note3:
Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
Note4:
The type of output capacitor should be tantalum or aluminum.
Ver: 2.6
Mar 19, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Definitions
Dropout Voltage
The input/output Voltage differential at which the regulator
output no longer maintains regulation against further re-
ductions in input voltage. Measured when the output drops
100mV below its nominal value. Dropout voltage is af-
fected by junction temperature, load current and minimum
input supply requirements.
Line Regulation
The change in output voltage for a change in input voltage.
The measurement is made under conditions of low dissi-
pation or by using pulse techniques such that average chip
temperature is not significantly affected.
G952
Load Regulation
The change in output voltage for a change in load current
at constant chip temperature. The measurement is made
under conditions of low dissipation or by using pulse tech-
niques such that average chip temperature is not signifi-
cantly affected.
Maximum Power Dissipation
The maximum total device dissipation for which the regu-
lator will operate within specifications.
Quiescent Bias Current
Current which is used to operate the regulator chip and is
not delivered to the load.
Ver: 2.6
Mar 19, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(V
IN
= +3.3V, C
IN
=1µF, C
OUT
=10µF, T
A
=25°C, unless otherwise noted.)
Line Transient
Line Transient
G952
Load Transient
Load Transient
Load Transient
Load Transient
Ver: 2.6
Mar 19, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
(continued)
G952
Load Transient Response (SOT-89)
Line Transient Response (SOT-89)
Short Circuit Current (SOT-89)
Overcurrent Protection Characteristics
(SOT-89)
Start-up (SOT-89)
60
Ripple Rejection (SOT-89)
I
L
=10mA
50
Ripply Rejection(dB)
I
L
=100mA
40
30
20
10
0
10
I
L
=500mA
C
IN
=10
µ
F ; C
OUT
=10
µ
F
100
1000
Frequency (Hz)
10000
100000
Ver: 2.6
Mar 19, 2007
TEL: 886-3-5788833
http://www.gmt.com.tw
5
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